This is the best post of the lot. All of this is interesting and, as illustrated in the posts, subject to endless debate. The bottom line is who has the power to take and hold territory. No borders are permanent. Look at the old Soviet Union, (not to mention the Roman, Ottoman and British empires). India and Pakistan are legal creations. People have been fighting over land in Europe for centuries. Someday the U.S. borders might not be as they are today.
I don't understand how we think that the U.S. government has some moral obligation to "restrain" Israel when they are doing exactly what we would do. Jimmy mentions Texas in his post. Can you imagine what U.S. public opinion would be if Mexican extremists were launching suicide bombing missions against U.S. Civilians from "occupied" Mexico in south Texas? We'd hunt them down, kill them and break their stuff. Exactly what Israel is trying to do now.